套管井地层电阻率测量的不规则水泥环影响  

Influence of Irregular Cement Sheath on Formation Resistivity Measurement in Cased Holes

作　　者：张亮[1] 侯庆宇[2] 王洪亮[2] 于天芳[2] 谢伟彪 吴立峰[4] 董文彬[5] 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学)长江大学地球物理与石油资源学院,湖北武汉430100 [2]中石油西部钻探工程有限公司测井公司,新疆克拉玛依834000 [3]中石油冀东油田分公司勘探开发研究院测井室,河北唐山063000 [4]长江大学地球物理与石油资源学院,湖北武汉430100 [5]中石化江汉油田分公司测录井公司,湖北潜江433123

出　　处：《石油天然气学报》2013年第5期75-78,3,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(40774073)

摘　　要：以前基于传输线模型分析套管井水泥环影响时,一般假设水泥环是均匀规则分布的,但实际往往是不规则分布。基于传输线数值算法,模拟和分析了不规则水泥环的过套管电阻率测井响应。研究表明:不规则水泥环对地层视电阻率测量结果会有较大的影响;高阻水泥环会引起明显的测量误差;水泥环厚度变化对地层视电阻率也有明显影响,特别是对低阻地层的影响,且理论上对高阻地层视电阻率的影响也不可忽略。The cement was assumed to be uniform distribution when the cement sheath affection in cased well was analyzed with the transmission line model,but actually it was distributed irregularly.Through casing resistivity logging response of irregular cement sheath was analyzed based on the transmission line numerical algorithm.The result shows that the irregular cement sheath has higher influences on the formation resistivity measurement.The higher resistance cement and the deeper the thickness of the cement sheath would cause more error for measurement,especially in the low resistant strata,which could not be ignored in the case of influencing the apparent resistance of high resistant strata.

关 键 词：套管井 地层电阻率 测井 水泥环 传输线方程 

分 类 号：P631.3[天文地球—地质矿产勘探]